Hairstylist Eugene Souleiman took a '90s approach to the look he created for Stella McCartney's otherwise modern lineup of brightly colored dresses and boxy blouses. "It's grunge," he said. "The clothes are quite conceptual, and I wanted to play it down and make the girls look quite cool."

Souleiman began by weaving in extensions to make hair thicker. Then he misted leave-in conditioner over dry roots, creating a "dirty sheen," and finger-combed hair back. "This makes it lustrous, but not in a glamorous way," he said.

Next, Souleiman twisted the ends and blasted them with a diffuser to achieve a dry, rumpled texture. "It's not really about doing anything too shiny or too manicured; it's just wearable hair," he said, finishing the look with a sharp middle part.

Healthy, gorgeous, and with a pop of color—that's how McCartney envisioned her models this season, said makeup artist Pat McGrath. "Stella is always about fresh and natural skin, but she loved the idea of using turquoise in the eyes."

There was nothing obvious about the way McGrath worked turquoise into the look: She mirrored McCartney's minimalist aesthetic, lining just the bottom inner rims with the bright shade. Then she dotted the spaces between the upper lashes with black liner and swiped on a few coats of black mascara.